GlobalISel: translate @llvm.va_start intrinsic.
Because we need to preserve the memory access being performed we need a
separate instruction to represent this.
llvm-svn: 294492
diff --git a/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp b/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
index eee78ea..8b06f4d 100644
--- a/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
@@ -583,6 +583,17 @@
// No target I know of cares about va_end. Certainly no in-tree target
// does. Simplest intrinsic ever!
return true;
+ case Intrinsic::vastart: {
+ auto &TLI = *MF->getSubtarget().getTargetLowering();
+ Value *Ptr = CI.getArgOperand(0);
+ unsigned ListSize = TLI.getVaListSizeInBits(*DL) / 8;
+
+ MIRBuilder.buildInstr(TargetOpcode::G_VASTART)
+ .addUse(getOrCreateVReg(*Ptr))
+ .addMemOperand(MF->getMachineMemOperand(
+ MachinePointerInfo(Ptr), MachineMemOperand::MOStore, ListSize, 0));
+ return true;
+ }
case Intrinsic::dbg_value: {
// This form of DBG_VALUE is target-independent.
const DbgValueInst &DI = cast<DbgValueInst>(CI);